ILS LOCALIZER ALIGNMENT AND STRUCTURE MODEL

Nonstationary statistical analysis of flight inspection data for 13 Category II and Category II-training Localizer facilities is used to obtain statistical models for the Localizer alignment error and structure. Models for these two components of Localizer anomalies are given in terms of two linear differential equations and Gaussian probability density functions especially useful for landing system performance analysis. The structure component of the received Localizer guidance signal is found to be stationary, to have a standard deviation of 2.47 microamperes, and a characteristic length of 1309. ft. The alignment error component of the received Localizer guidance signal is found to have a mean of 2.25 microamperes (probably due to the relatively small sample of different Localizer facilities), and a standard deviation of 4.92 microamperes.

• Corporate Authors:

  Systems Technology, Incorporated

  13766 South Hawthorne Boulevard
  Hawthorne, CA  United States  90250

  Federal Aviation Administration

  Systems R&D Service, 800 Independence Avenue, SW
  Washington, DC  United States 
• Authors:
  • Clement, W F
  • Hofmann, L G
  • Klein, J A
• Publication Date: 1975-5

Media Info

• Pagination: 102 p.

Subject/Index Terms

• TRT Terms: Air traffic control; Alignment; Errors; Glide path systems; Instrument landing systems; Mathematical models; Power spectra; Radio beacons; Radio beams; Statistical analysis
• Old TRIS Terms: Localizers
• Subject Areas: Aviation; Data and Information Technology; Operations and Traffic Management;

Filing Info

• Accession Number: 00094464
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FAA-RD-75-102 Final Rpt., STI-TR-1043-3
• Contract Numbers: DOT-FA74WA-3340
• Files: NTIS, TRIS, USDOT
• Created Date: Apr 21 1976 12:00AM